package com.atguigu.lease.common.utils;

import com.atguigu.lease.common.exception.LeaseException;
import com.atguigu.lease.common.result.ResultCodeEnum;
import io.jsonwebtoken.*;
import io.jsonwebtoken.security.Keys;
import lombok.extern.slf4j.Slf4j;

import javax.crypto.SecretKey;
import java.util.Date;

@Slf4j
public class JwtUtil {
    private static long tokenExpiration = 60*60 *1000L;
    private static SecretKey tokenSignKey = Keys.hmacShaKeyFor("M0PKKI6pYGVWWfDZw90a0lTpGYX1d4AQ".getBytes());

    public static String createToken(Long userId,String username){
        String token  =Jwts.builder()
                .setSubject("USER_INFO")
                .setExpiration(new Date(System.currentTimeMillis()+tokenExpiration))
                .claim("userId",userId)
                .claim("username",username)
                .signWith(tokenSignKey)
                .compact();
        return token;
    }
    public static Claims parseToken(String token){
        if (token==null){
            throw new LeaseException(ResultCodeEnum.ADMIN_LOGIN_AUTH);
        }try
            {
                JwtParser jwtParser = Jwts.parserBuilder().setSigningKey(tokenSignKey).build();
                return jwtParser.parseClaimsJws(token).getBody();
            }catch (ExpiredJwtException e){
            throw new LeaseException(ResultCodeEnum.TOKEN_EXPIRED);
        }catch (JwtException e){
            throw new LeaseException(ResultCodeEnum.TOKEN_INVALID);
        }
    }
}
